Support for indicator gauges



Jyne 24, 1930. l.. SCUSA 1,765,624

SUPPORT FOR INDICATOR GAUGES Filed Feb. 27, 1928 lll if agi Tl 2 f @www @7 /QWUWWA Patented June 24, 193() UNITED STATES PATENT OFFICE LINO SCUSA, 0F PHOENIX, NEW" YORK SUPPORT FOR INDIGATOB GAUGES application nica February av, 192s. serial No. 57,386.

' tain of the said supporting elements being arran ed to safeguard the gauge in case the scale gar is accidentally struck or otherwise roughly handled. A further obJect is to provide a series of similar brackets by which the gauge mechanism may be mounted upon a lathe, one of said brackets being secured to the carriage of the lathe whereby said mechanism/may be carried along with the carriage and the scale bar maintained in the proper position relatively to the cutting tool; the said bracket being arranged to hold the gauge mechanism in the operative position by tension-controlled means that needs no attention on the part of the operator, and said bracket being equipped with meansfor holding the gauge in any adjusted positions against the ordinary lathe vibrations. A. further object is to provide means whereby the gauge mechanism may be disposed or rotated in planes at different angles to the axes of the work and the said bracket. A further object is to provide brackets or like elements which may be fixed rigidly to thev head or other stationary part of the lathe for adjustably supporting and enabling the gauge mechanism to be moved in planes parallel to the axis of the lathe in order to effect gauging in close proximity to the lathe chuck. And a further object is to generally improve and simplify gauge supports of the character, as well as to render the gau e universal in its movements relatively to t e work.

I attain these objects by the means set forth in the detailed description as follows, and as illustrated by the accompanying drawing, in which- Figure 1 is a broken front side elevation of a lathe to which my improvement is applied, showing the gauge in the operative position and movable with the carriage. Fig. is a rear end elevation of the same, showing the gauge supported in the operative position by a bracket secured to the carriage. Fig. 3 is a broken elevational view of the carriage bracket, showing the gauge tilted at an angle to the operative position of Fig. 1. Fig. 4 is a broken end elevation, showing the gauge tilted, in a plane at right angles to the axis of the work. Fig. 5 is an enlarged View of the carriage bracket partially in elevation and partially in vertical section, the latter taken on line 5 5 of Fig. l, showing the groove of the guide rod facing downwardly. Fig. 6 is a similar view of the bracket secured to the head of the lathe, partially in elevation, and partially in Vertical section taken on line 6 6 of Fig. l, showing the guide rod reversed and its groove facing upwardly. Fig. Z is a sec tional view, taken substantially on line 7 7 of Fig. l, showing the means for pivoting the gauge body to the guide rod. Fig. 8 is a horizontal section, taken on line 8 8 of Fig. 7. And Fig. 9 is a broken elevational view, taken in the direction of the arrow in Fig. 7, showing the guide rod connected to the gauge body.

ln the drawing, Fig. l shows conventionally a lathe, comprising a frame 2, head 2', chuck 2a, tail-piece 2b, and carriage 2C, upon which is mounted the usual tool rest 2d, and tool 2e. 3 represents generally the indicator gauge, which consists of a semi-circular hollow body 3 having a leg 3a, the body being provided with a dial 4, and a needle 5 that sweeps the dial, and preferably indicates fine fractional parts of an inch. rEhe rear face of the body 3 is formed with a circular boss 3", in which are formed diametrically opposed sockets 3c 3d, the said boss having a concentric threaded opening 3e to receive a screw 6', that pivotally supports the cylindrical member 6, the said member being normally spaced from the boss and provided with a tension-controlled pin 6a, which is adapted to engage the said sockets when member 6 is rotated on the s crew 6. To member 6 is detachably but rigidly secured a guide rod 7, (see Fig. 9), which may tubular, as shown in the drawing, the said rod having an external longitudinal groove or socket 7, as best seen in Figs. 2, 4, 5 and The rod 7 may be swung on the (screw 6 body 3', :for reversing its direction, by the loosening of the screw 6', and prov1ded that sufficient force is exerted to'cause the pin 6EL to be dislodged from the engaged socket (3), as may be understood by Figs. l, 3., 7 and 8. The pin 6a is normall under tension of a spring .6", which is hel in place by a screw 6c. The body 3 is slotted vertically, as at 3f, to slidably receive the gauge bar l8, said bar being graduated for indicating certain measured movements of the bar, and its lower end being normally held by gravity in engagement with a p iece of work, as w, for gauging and indicatingthe progress of the turning, by tool 2 (see Fig: 1).

In Figs. 1 and 2, the gauge 3 is shown in the operative position, wherein thescale bar 8 rests upon the work m. In Fig. 3 the gauge is shown tilted on the guide rod 7, by the dislodgment of the pln 6a from the socket 3 to the extent shown by the dotted circle in Fig. 7. The provision of the p1n 6a and the sockets Bc--d enables the gauge mechanism to be swung in either direction in planes parallel to the axis of the Work m, 1n case the auge bar 8 is accidentally struck a blow. T e operator may effect the' same swinging of the gauge to enable him to remove or replace the work.

9 represents an upright bracket which is preferably mounted upon the rear edge of the carriage 2, as by a screw 2f, and travels with the carriage. The top end of the bracket 9 is formed with a tubular crosshead 9 whose axis parallels that of .the Work m, the bore of said head corresponding to the diameter ,of the guide rod 7, in which said rod may be reciprocated and rotated for positioning the auge 3 relatively to the tool 2, as shown in igs. 1 and 2. The head 9 is formed with a depending socket or lug 9, in which is disposed a pin 9b that is arranged to en age the groove 7 of the guide rod, for gui ing the latter as Well as preventin its accidental rotation in the head (see Figs. 2 4 and 5). The pin 9b is preferably yieldably held in the groove 7 by a sprin 9, as shown in Fig. 5.

In ig. 4 the gau e 3 is shown tilted 11pwardly away from t e work a; u on the axis of the cross-head 9', and the pin 9b is disengaged from the groove 7 of the rod. The spring 9c tends to hold the gauge in the latter or any other tilted position, and the gauge may be righted, as shown in Figs. 1 and 2, by the operator simply swinging the body 3 in the reverse direction until the pin 9b again snaps into the groove 7 which brings the scale bar 8 into the operative positions of Figs. 1 and 2. The head 9 is also ormed with an upwardly facing threaded lug 9d to receive a set-screw 9e, by which the rod 7 may be made rigid in the head.

10 represents a bracket which is shown rigidly mounted on the head 2 of the lathe, as by a screw 2f, and said bracket is therefore stationary at all times. Bracket 10 has a similar cross-head l0', a socket 10a, which houses a tension-controlled pin 10b, a threaded lug 10, and a set-screw 10d, but the sockets l0a and 10 are inverted as compared with bracket 9, as shown at the left in Fig. 1, and as shown in Fig. 8, for enabling the rod 7, which must also be reversed, in order to properly position the gauge bar 8 close to the right face ofthe chuck adjacent which tool 2 may be cutting.

Having thus described my invention, what I claim, is-

1. An indicator gauge support for lathes and the like, including a bracket having a tubular head, vmeans to sec-ure the bracket to a lathe, a guide rod rotatably and slidably received in said bracket head and having a head on one end thereof, means to iotatably connect a gauge to the rod head so as to permit the gauge to move in a plane parallel to the axis of the rod, means to yieldably secure the rod head against rotation relative to the gauge, and means to adjustably secure the rod to the bracket head.

2. An indicator gauge support for lathes and the like including a supporting member, means to secure the member to a lathe, a guide rod, means to rotatably connect said rod to the supporting member, and means to rotatably secure a gauge to the rod for movement in a plane parallel to the axis of the rod.

3. An indicator gauge support for lathes and the like includin a supporting meniber, means to secure t e member to a lathe, a guide rod, means to rotatably connect said rod to the supporting member, yielding means to hold the rod against accidental rotation while permitting same to rotate under abnormal pressure, means to rotatably connect a gauge to the rod, and yielding means to hold the gauge against accidental rotation while permitting same to rotate under abnormal pressure.

4. An indicator gauge for a lathe or the like including a pair of spaced supports each having a tubular head, a gauge having a movable work engaging element, a rod receivable in either of said heads, and means to rotatably connect the rod to the gauge so as to enable same to be rotated throughout substantially 180 thereby to support the gauge from either of the supports and with the gauge maintaining its same relation to the work on either of the said positions of the rod.

5. An indicator gauge for a lathe or the like including a pair of spaced supports, gauge mounting means, means to secure said mounting means to either of the supports, and means to rotatably secure said mounting means to a gauge so as to enable the mounting means to 'be rotated about the gau e and secured to either of the supports an with the gauge maintaining its same relation to the work in either o said mounting means.

6. An indicator gauge for a lathe or the like including a pair of spaced supports each having a tubular head, a rod receivable in either of said heads, and means to rotatably connect the rod to a gau e so as to enable same to be rotated throug out substantially 180 thereby to support the gauge from either of the supports and with the gauge maintaining its same relation to the work in either oi the said positions of the rod, said rod having a longitudinal groove, and tensioned rod holding means carried by the supports and disposed to engage in said positions of the v groove in its lrespective positions.

7. An indicator gauge support for lathes and the like including a supporting member, means to secure the member to a lathe, a guide rod, means to rotatably connect a gauge to the rod, means to rotatably connect said rod to the supporting member, and yielding means to hold the rod against accidental rotation, said yielding means being of such predetermined strength as to, permit the rod to rotate under abnormal pressure.

In testimony whereof I ature.

aiix my si LINO S 

